k-o.pro

Code Beautifier

Paste messy JSON, HTML, CSS, or JavaScript and get clean, indented output instantly.

Language:

Input

Output

Formatted output will appear here…

Supported formats

  • JSON — validates and formats with configurable indentation
  • HTML — rebuilds tag hierarchy with consistent indentation
  • CSS — formats selectors, properties, and values with consistent spacing
  • JavaScript — reformats code with standard indentation rules

Runs entirely in your browser

All formatting happens client-side. Nothing is sent to a server. That matters when you're working with internal code, API keys, client configs, or anything you'd rather not paste into a third-party service.

When you actually need this

  • Minified third-party scripts you need to read in a code review
  • Schema markup generated by a CMS plugin that outputs single-line JSON-LD
  • CSS inherited from a legacy stylesheet with no consistent formatting
  • API responses returned as a single-line JSON string
  • Any code that arrived as a wall of text and needs to be human-readable

How to use it

  1. Select the format (JSON, HTML, CSS, or JavaScript)
  2. Paste your code into the input panel
  3. The formatted output appears instantly in the right panel
  4. Copy with one click

Related tools: schema markup generator and schema markup validator.